Drill-brace.



W. J. PARSONS & J. A. LELAND.

DRILL BEACH.

APPLIUATION FILED MAY 7, 1909.

Patented Dec. 7, 1909.

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llNllTE SATES *ATENT FFQE.

WILLIAM J. PARSONS AND JOI-TN A. LELAND, OF MONTAGUE, MASSACHUSETTS, AS-

SIGNORS TO MILLEBS FALLS COMPANY, OE MILLERS FALLS, MASSACHUSETTS, A

CORPORATION Oli MASSACHUSETTS.

DBILL-BRACE.

Application tiled May 7, 1909.

To all whom it may concern:

'Be it known that we, TVILLIAM J. Pensons and JOHN A. LELAND, both ofMontague, in the county of Franklin and State of Massachusetts, haveinvented certain new and useful Improvements in Drill-Braces, of whichthe following is a specification.

This invention relates to a brace or stock having the ordinary generalform of a bit brace, and provided with a socket or chuck adapted to holda drill or equivalent tool, and rotatable independently of the brace,and with multiplying gear mechanism whereby the socket or chuck may berotated by one hand of the operator at a relatively rapid rate.

The invention has for its object to enable the driving member of themultiplying gear mechanism to be located in different positionsrelatively to the brace body to suit the exigencies of different kindsof work, and enable the operatoi to so locate the said driving member'and its operating crank as to make the operation of the operatingmechanism convenient under different circumstances.

The invention consists in a drill brace comprising a brace body, a chuckor socket rotatably connected therewith, a bevel gear affixed to thechuck, a driving bevel gear meshing with the chuck gear, and means forsecuring the driving gear in different positions relatively to the chuckbody.

The invention also consists in certain details of mechanism incidentalto the general purposes of the invention.

Of the accompanying drawings forming a part of this specificatiom-Figure1 represents a side elevation of a drill brace embodying our invention.Fig. 2 represents an enlargement of a portion of Fig. 1, showing insection the driving member of the multiplying gear mechanism and thepreferred means for securing said member in different positionsrelatively to the brace body. Fig. 3 represents a section on line 3 3 ofFig. 2.

The same reference characters indicate the same parts in all theiigures.

In the drawings,-12 represents the portion of a brace or stock which hasthe bearing for the socket or chuck 13, the stock including the usualcrank arm 14 having a handle 15, and a head or rest 16. The socket orchuck 13, which may be of any suitable Speccaton of Letters Patent.

Patented Dec. '7, 19%9.

serial No. 494,658.

construction7 is rotatable independently of the brace body, and isprovided with a bevel gear 17 which is rigidly attached to the chuck andforms the driven member of the multiplying gear mechanism.

18 represents a larger bevel gear which meshes with the chuck gear 17and forms the driving member of the multiplying gear mechanism, saidgear being provided with an operating crank 19. The driving gear 18 isconnected with the portion 12 of the brace body by means embodying ourinvention, said means enabling the driving gear to be secured indifferent positions relatively to the brace body crank 14, so that theoperating crank 19 may be located to operate in any one of a pluralityof planes relatively to the body crank 14 which the convenience of theoperator may require in avoiding obstructions to the free rotation ofthe driving gear.

In the preferred embodiment of our inn vention here shown, the portion12 of the brace body is provided with a circular boss 20 which is inalinement with the axis of the chuck, and is rigidly secured to or formsan integral part of the portion 12.

21 represents a sleeve which has a snug movable fit on the boss 20 andis provided With a tubular stud 22 extending substantially at a rightangle with the axis of the chuck and constituting the bearing upon whichthe driving gear 1S is journaled, the bore of the tubular stud beingprovided with an internal screw thread.

23 represents a set screw, the inner end portion of which is threaded toengage the internal thread of the stud 22, the head 24 of the set screwbeing formed to bear on the outer end of the hub of the driving gear 18.The sleeve 21 is provided with a shoulder 25 which bears on the innerend of the hub of the driving gear, said hub being adapted to rotatefreely on the stud 22 between the head 24 and shoulder 25. The inner endof the set screw engages the perimeter of the boss 20, said inner endbeing preferably of conical form and the boss being preferably providedwith a series of sockets 26, each of which is adapted to engage theinner end of the set screw. Said sockets, as here shown, are three innumber and are located gt different portions of the periphery of theoss.

It will be vseen that when the set screw is turned home with its innerend coinciding with one of the sockets 2G, a positive engagement iseffected between the stud 22 and the boss 20, and that by changing theengagement of the set screw from one socket 2G to another, the positionof the driving gear 1S relatively to the brace body may be varied asillustrated in F ig. 3, where the stud and the driving gear thereon areshown by full lines inl one position and by dotted lines in a dierentposition. The operator is therefore enabled to locate the driving gearaud its crank ineither of a plurality of positions to suit therequirements of the work on which he is engaged, and avoid` obstructionto the free rot-ation of the operating crank.

lVe claim:

1. A drill brace comprising a brace body, a chuck rotatively connectedtherewith, said. body including a U-shaped portion forming a crank, abevel gear atlixed to the chuck, a driving' bevel gear meshing' with thechuck geai', and means for securing the driving gear in differentpositions relatively to the chuck body.

2. A drill brace comprising a brace body, a chuck rotatively connectedtherewith, said body including a U-shaped portion forming a crank, abevel gear atlixed to the chuck, a stud pivotally connected to the body,a driving bevel gear journaled on said stud and meshing with the chuckgear, the axis on which the stud is adapted to swing being in alinementwith the axis of the chuck and its gear, whereby the stud is adapted tobe axis of the chuck, a bevel gear attached to the chuck, a drivingbevel gear journaled on the stud and meshing with the chuck gear, and aset screw which engages the internal thread of the stud and theperimeter of the boss, and is adapted to adjustably secure the stud tothe boss in different positions.

4. In a drill brace, the combination with the body having a rest andchuck in alinement and having an intermediate crank, of multiplyinggearing for the chuck; said gearing being mounted below the crank. 4tokenable the device to be operated by the cranlnwithout interference bysaid gearing, and means for adjusting said gearing to differentpositions about the axis of the chuck bearing.

In testimony whereof we have atlixed our signatures, in presence of twowitnesses.

VILLIAM J. PARSONS. JOHN A. LELAND.

Witnesses LIZZIE STRACHAN, K. E. NICHOLS. Y

